581628372 has 72 divisors (see below), whose sum is σ = 1494773280. Its totient is φ = 175893120.

The previous prime is 581628367. The next prime is 581628389. The reversal of 581628372 is 273826185.

581628372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117222 + ... + 122082.

It is an arithmetic number, because the mean of its divisors is an integer number (20760740).

Almost surely, 2^581628372 is an apocalyptic number.

581628372 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581628372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747386640).

581628372 is an abundant number, since it is smaller than the sum of its proper divisors (913144908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

581628372 is a wasteful number, since it uses less digits than its factorization.

581628372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953 (or 4938 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 581628372 is about 24116.9726955935. The cubic root of 581628372 is about 834.7348158105.

The spelling of 581628372 in words is "five hundred eighty-one million, six hundred twenty-eight thousand, three hundred seventy-two".